Pattern-grading machine



Oct. 16, 1934. A, PECHER PATTERN GRADING MACHINE 2 Sheets-Sheet 1 Filed Dec.

Oct. 16 1934. A. PECHER PATTERN GRADING MACHINE 2 Sheets- Sha er. 2

Filed Dec. 27, 1932 r l I [I Patented Oct. 16, 1934 UNITED. STATES PATTERN- GRADING MACHINE Albrecht 'Pecher, Orebro, Sweden, assignor to Aktiebolaget Linham, Stockholm, Sweden Application December 27, 1932, Serial No. 649,109 In Germany June 30, 1932 8 Claims.

As is well-known, pattern-grading machines are used in the shoe making industry for the production from a model pattern, representing a shoe part, of similar patternsof different longitudinal and transverse dimensions. In order to magnify or reduce the measurements of the model pattern, independent transmitting mechanisms are provided, which are movable in two different directions perpendicular to each other in a pantographic manner.- The hitherto known machines of this type are either of a very complicate construction, and thus expensive in manufacture, or of a more simple design in which case their attendance will be exceedingly diiiicult, requiring carefully trained attendants. By reason of the difficult attendance, faults often occur, even in case of very skilled attendants, and furthermore, such machines operate very slowly due to the fact that the exact adjustment of the various instrumentalities for controlling the length and width grading is a very time consuming operation.

The present invention has for its object to provide a grading machine, especially for shoe makingwhich is of a simple design and, thus, cheap in manufacture and, due to the simple adjusting and working operations, does not require specially trained attendants. In spite of its simple design, the machine according to this invention may be provided-with apunch for directly cutting the graded patterns. This is due to the fact that the machine because of its design is very stable and, as a result, vibrations resulting from the operation of the punch motor are substantially avoided.

The invention consists, broadly, in that a table to carry the'model or the graded object to be pro-- duced, as a pattern, is movable rectilinearly, and is operated exclusively by means of a pantographic mechanism, by which said table is connected to a rectilinearly moving guide way or beam the longitudinal direction of which is, preferably, perpendicular to the path of movement of the table and along which two exclusively by means of another pantographic mechanism connected carriages are movable, which carry the contact point or feeler to follow the model, and the punch or scriber, respectively, to act on the work to be graded (as a pattern).

One embodiment of a machine according to this invention is illustrated in the accompanying drawings.

Fig. 1 is a side elevation of the machine, with partsremoved. Fig. 2 is a complete top plane view'ofthe'machine. 7

To facilitate understanding, the machine is illustrated in a very diagrammatic manner; it is v to be noted, however, that it may be provided with further mechanisms well known from other grading machines, without rendering. the attendance more difiicult.

With reference to the drawings, the numerals 1 and 2 indicate two rectilinear guide ways or tracks mounted on the stationary -bed-p1ate"20 of the machine, upon which runs a beam 3, on rollers 4. Said beam extends perpendicularly to the longitudinal direction of said tracks and is, thus, movable in its transverse direction. Carried by said beam to run in the longitudinal di-.- rection thereof are two carriages 5 and 6,'preferably on rollers including ball bearings toreduce friction. The beam 3 has a laterally projecting curved arm 8 attached to the lower surface of the beam which carries at its free end a pivot 9 rotatably but not slidably mounted in the arm 8, and formed with a boring extending in the transverse direction through the pivot, that is to say, along a diameter thereof, in which boring the correspondingly shaped'end'of a lever 10 slidably fits. The other end of said lever is shaped as a segment lfia provided with a scale and pivoted, nearly in its middle, to the carriage 6, at 11.

Slidably mounted on the segment 10a is a slide 12 which may be held in any desired position by means of the clamping screw 13. Pivoted to this slide, at 14, is one end of an arm 15, the other end of which is pivoted to the carriage 5 at 16.

The beam 3 has 'a transversely projecting arm or extension 3a carrying a pin 17 which is rotatably but not slidably mounted therein. This pin is formed with a transversely extending boring, that is to say, a diametrically extending boring-slidably engaged by the correspondingly shaped, for instance, cylindrical, end of a lever 18. Theo'ther end of this lever'is curved like a segment 18a, and

said segment 'ispivotally connected, nearly in its middle, at 19, to the stationary bed-plate '20 of the machine.

The segment 18a carries a slide21, which may be held in any adjusted position on the segment by means of a clamping screw 22. Pivotally connected to this slide is an arm 24., by the pivot 23, the other end of said arm being pivoted at 25 to the lower surface of a table 26. Said table moves in rectilinear guide Ways 2'7 by means of rollers 28, preferably provided with ball bearings in order to reduce the friction to a minimum. The guide ways 27 are mounted on the bed-plate 20 and extend perpendicularly to the beam 3 and are, con- 'sequently, parallel to the guide tracks 1 and 2.

of the pantographic mechanism 1725. this operation, the slide 21 be in such a position that the pivots 19 and 23 are in register with one The carriage 5 supports both a cutting or punching device, comprising a vertically up and down moving punch 29 driven by an electric motor 30 supported on the carriage 5, and a scriber 31. Said scriber 31 is movable over a table 32 (working table) secured to the stationary bed-plate 20 of the machine which is adapted to support the cardboard piece or the like, upon which the graded pattern is to be traced, while the cardboard piece is held against movement on the table by any suitable means, not shown. The punching device 29-30 is carried at the free end of an arm 33 horizontally projecting from the carriage 5, and between said arm and the carriage 5 there is provided a space 34 adapted'to receive the sheet of cardboard or the like in which the graded pattern is to be cut or punched. By the table 32 there is provided a stationary track 36 parallel to the guide tracks 1 and 2 upon which runs a carriage 3'7, which may be held against movement in any desired'position, by means of a clamping screw 38. The carriage 3'2 carries a pressure plate 39 adapted to clamp the cardboard sheet 35 on the upper side of the carriage by means of suitable clamping screw 40. The scriber 31 is connected to the carriage 5 by means of screws 41 so that it may be removed from the carriage, if desired.

The carriage 6 carries the contact point or feeler 42 to follow the outline of the model.

Rotatably mounted in a circular recess formed in the table 26 is a circular plate 43, at the circumferential edge of which a number of apertures 44, as four, are formed at equal distances from each other, which may be engaged by a spring operated stop member 45. If there are, for instance, four apertures 44, then the circular model supporting table may be adjusted to four difi'erent positions spaced apart an angle of 90 degrees.

The operation of the mechanism described is as follows:

The mechanisms 9-16 and 1'725 constitute, asmay be readily seen, pantographicmechanisms of a design well-known in connection with grading machines, and have for their purpose to magnify or reduce the movements of the feeler 42 so that a magnified or reduced pattern will be reproduced upon or cut in the sheet of cardboard resting on the operating table 32, or clamped in the holding means 3740. For instance, the adjustment or" the longitudinal dimension of the shoe may be 'efiected at the scale of the segment 10a and, thus, the length grading is performed by means of the elements 916. It is readily understoodthat the movements of the feeler 42, and thus of the carriage 6 connected thereto, in the longitudinal direction of the beam 3, will be magnified, when transferred to the carriage 5 and to the punch 29 or the scriber 31, if the slide 12 is situated in a position under the pivot 11 in Fig. 2, that is to say, in the position shown in this figure. With the slide 12 adjusted to the opposite side of the pivot 11, a reduction instead of a magnification will be obtained, whereas with the pivots 11 and 14 in register withone another, the movements will be transmitted without being changed, that is to say,

the journal 11 represents the zero point of the .scale of the segment 10a.

The movement of the feeler 42 in a direction parallel to the guide tracks 1 and 2, that is, perpendicular to the beam 3, will be transmitted to the movable table 26 through the intermedium If, in

another, then the rotary movement of the lever 18 caused by the said movement of the ieeler 42 will have no influence on the arm 24 so that in this case the table 26 will remain stationary with regard to the bed-plate 20. If, on the contrary, the slide 21 is adjusted to a position to the right hand side of the pivot 19 (Fig. 2), the said rotary motion of the lever 18 will efiect a rectilinear sliding movement of the table 26 so that, as seen from the stationary bed-plate 20, the feeler 42 and the table 26 will move in opposite directions. The movement or the component of movement of the feeler 42 with relation to the table 26 in the direction of the guide tracks 1 and 2 is composed of the movement of the feeler 42 with relation to the stationary bed-plate 20 and the movement of the table 26 with relation to the same bed-plate 20 so that upon a movement of the feeler 42 a certain distance with relation to the table 26, the scriber 31 or the punch 29 will move a shorter distance with relation to the stationary bed-plate 20, that is, with relation to the table 32 or the stationary cardboard sheet 35. Thus, the distance described by the feeler 42 parallel to the guide track 1 upon the table 26 will in this case be reproduced on a smaller scale upon the table 32, or the cardboard piece 35. In case-of oblique movements, the magnifications or reductions are combined, in well-known way, of the magnifications and reductions in the two main directions, as represented by the guide track 1 and the beam 3, respectively.

The ratio of magnification or reduction in these two main directions depends, of course, on the distances between the pivots 11 and 14 and between the pivots 19 and 22, respectively, and may thus be adjusted at will by adjustment of the slides 12 and 21 on the scales of the segments 10a and 18a.

The rotary mounting of the model supporting table 43 permits a certain saving of the material, as the cardboard piece 33, from which the graded patterns are to be produced. This is due to the fact that it is possible, after the feeler 42 has been once moved along the outline of the original model 46, and an outline, as 47 has been traced by the scriber 31 or cut by the punch 29, that the table may be rotated, for instance, an angle of 180, and then the feeler may again be caused to follow the outline of the model, causing the scriber 31 or the punch 29, as the case may be, to trace or out another outline 48, situated beside the outline 4'7, with the projecting portions of each of these outlines engaging the recessed portions of the other. It is thus seen that the pattern outlines may be applied to the work in the best way possible, thereby reducing the waste of material to a minimum. The rotary mounting of the table 43 will also allow the tracing or cutting of several pattern outlines, as 4'7, 48, without the need of exchanging or adjusting the card- '1 board piece.

What I claim is:

1. In a machine of the class described, the combination of two carriages movable in common in one direction and with relation to each other in another direction, a pantographic mechanism to control the relative movement of the carriages, a model follower on one carriage and work treating means on the other carriage, a holder for the model and a holder for the work, one of said holders being movable in the common direction of movement of the carriages, and a pantographic mechanism to control the relative movement of the movable holder with relation to the common movement of the carriages.

2. In a machine of the class described, the combination of twocarriages movable with relation to each other in a definite direction, means to support the carriages movable together with the carriages in another direction, a pantographic mechanism interconnecting the carriages, a model follower and work treating means carried by the carriages respectively, a model supporting table and a work supporting table, one of said tables being movable in the direction of movement of the carriage supporting means, and a pantographic mechanism to connect said movable table to said carriage supporting means.

3. In a machine of the class described, a carriage, a scriber and a punch on this carriage, separate means to hold works to be acted on by said scriber and said punch, another carriage, a model follower on said other carriage, means to support the carriages so as to allow them to move with relation to each other in a certain direction, said supporting means being movable together with the carriages in another direction, a model supporting table and a work supporting table, one of said tables being movable in the direction of movement of the carriage supporting means, means to effect relative movements at a varying ratio in one direction between the carriage carrying the model follower and the carriage carrying the work treating tools, and means to effect relative movements at a varying ratio in another direction between the said carriage support and the movable table.

4. In a machine of the class described, a stationary table and a rectilinearly movable table, a revolving disk in said movable table, which is adjustable to definite positions, a beam movable in the same direction as the movable table, two

. carriages on said beam movable thereon in a different direction from the direction of movement of the beam, a pantographic mechanism to effact a relative movement of the carriages at a varying ratio, another pantographic mechanism to effect relative movement between the movable table and the beam at a varying ratio, a model follower on one carriage, and work treating means on the other carriage.

5. In a machine of the class described, a stationary table to support a work, a holder for another work, a scriber to treat one work and a punch to treat the other work, a carriage to carry said work treating tools, a movable supporting member for said carriage, another carriage on the same supporting member, a model follower on said other carriage, a pantographic mechanism between the carriages, a movable table under said follower, a pantographic mechanism between said table and the carriage supporting member to effect a relative movement therebe'tween at a varying ratio, and a revolving disk in said movable table arranged so as to be capable of adjustment to different definite positions.

6. In a machine of the class described, a bedplate, guide tracks on said bed-plate, a beam movable on said guide tracks while extending substantally at right angles thereto, two carriages on said beam movable in the longitudinal direction thereof, a model follower on one carriage and means to treat the work on the other carriage, guide ways on said bed-plate extending parallel to said guide tracks, a table mounted to move in said guide ways, lateral projections on said beam, a pivot pin rotatably mounted in each of said projections, said pivot pins having each a transverse boring, a lever of segmental form pivotally mounted on the bed-plate and having one end formed as a straight rod slidably engaging the boring of one of said pivot pins, a slide carried by said lever so as to be adjustable to different positions thereon, a connecting rod between said slide and said table, another lever of segmental form pivotally connected to one of said carriages and having one end formed as a straight rod slidably engaging the boring in the other pivot pin, a slide on said lever adjustable to different positions thereon, and a connecting rod between said slide and the other carriage.

7. In a machine of the class described, a bedplate, guide tracks on said bed-plate, a beam movable on said guide tracks while extending substantially atv right angles thereto, two carriages on said beam movable in the longitudinal direction thereof, a model follower on one carriage and means to treat the work on the other carriage, a table rigidly connected to said bedplate, guide ways on said bed-plate parallel to said guide tracks, a table mounted to move in said guide ways, a revolving disk mounted in said movable table and adjustable to different positions therein, lateral projections on said beam, a pivot pin rotatably mounted in each of said projections, said pivot pins having each a transverse boring, a lever of segmental form pivotally mounted on the bed-plate and having a straight end portion slidably engaging the boring in one of said pivot pins, a slide carried by said lever so as to be adjustable to different positions thereon, a connecting rod between said slide and said movable table, another lever of segmental form pivotally connected to one of said carriages and having a straight end portion in slidable engagement with the boring of the other pivot pin, a slide on said lever adjustable to different positions thereon, and a connecting rod between said last-mentioned slide and the other carriage.

8. In a machine of the class described, a guide beam movable in a direction at right angles to its longitudinal axis, two tables arranged under said beam spaced apart a constant distance in the direction of the longitudinal axis of the beam, one of said tables being stationary and the other movable in the direction of movement of the beam, a pantographic mechanism to transmit motion between said guide beam and said movable table at varying ratio, means carrying a model follower and means carrying work treating means arranged to move with the guide beam over said movable and stationary tables respectively, said means carrying the follower and treating means being movable with relation to each other in the longitudinal direction of the beam, and another pantographic mechanism to transmit motion between said means carrying the follower and said means carrying the work treating means at a varying ratio.

ALBRECHT PECI-IER. 

